sipgate basic - Your free telephony servicehttps://www.sipgatebasic.co.uksipgate basic is a free VoIP phone service including voicemail and a real local UK number.

Tel2 - Feature-rich VoIP provider with FREE signup and UK DIDshttps://www.tel2.co.uk/Offer a host of services including call recording, web and video conferencing and collaboration services, faxmail (+ T.38 passthru), locate me, Smartphone and Desktop Apps and more. Suitable for all users from residential, business through to large call centres.

Net Telco: Homehttps://www.net-telco.net/Net Telco offers UK and international telephone numbers and call handling services that you can manage and configure on-line through a simple to use Web interface.

Cheap International Calls | Localphonehttps://www.localphone.comLocalphone have slashed the cost of international calling! Each contact gets their own local number - no contracts, no hidden charges, and no monthly fees!

Has anyone used these guys? I'm looking at for a cheap provider for calls to Poland, they seem to be 0.6p/min for landlines 1.5p/min for mobiles which is the best i've found. But maybe there are other hidden costs?

Pete33

No hidden costs, I use localphone.com for all my outgoing mobile phone calls from my VOIP system and just pay the rate they quote on their webpages. Also with localphone, you can credit it by £1 so it is cheap to try out. The most you can lose is £1.